Hello,
Please update the theme and Core plugin – https://xstore.helpscoutdocs.com/article/63-theme-update https://xstore.helpscoutdocs.com/article/37-plugins-update
Go to Header Builder > Multiple headers > edit the Custom header
Also, read this article – https://xstore.helpscoutdocs.com/article/139-cant-see-changes-in-the-header-on-the-home-page
Regards